EP1317899A3 - Shape measurement apparatus - Google Patents

Shape measurement apparatus Download PDF

Info

Publication number
EP1317899A3
EP1317899A3 EP02027562A EP02027562A EP1317899A3 EP 1317899 A3 EP1317899 A3 EP 1317899A3 EP 02027562 A EP02027562 A EP 02027562A EP 02027562 A EP02027562 A EP 02027562A EP 1317899 A3 EP1317899 A3 EP 1317899A3
Authority
EP
European Patent Office
Prior art keywords
measurement
shape
setting
mode
condition
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP02027562A
Other languages
German (de)
French (fr)
Other versions
EP1317899B1 (en
EP1317899A2 (en
Inventor
Naoki Isogai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nidek Co Ltd
Original Assignee
Nidek Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nidek Co Ltd filed Critical Nidek Co Ltd
Publication of EP1317899A2 publication Critical patent/EP1317899A2/en
Publication of EP1317899A3 publication Critical patent/EP1317899A3/en
Application granted granted Critical
Publication of EP1317899B1 publication Critical patent/EP1317899B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
    • G01B11/25—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. one or more lines, moiré fringes on the object
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
    • A61B3/107—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for determining the shape or measuring the curvature of the cornea

Abstract

A shape measurement apparatus capable of saving time and effort of an examiner and improving measurement accuracy. The apparatus for measuring a spherical shape of an object to be examined comprising measurement means where first projection means projects first targets for measurement onto a spherical surface to be measured, first detection means detects images of the projected first targets and calculation means obtains a shape of the surface based on the detected images, output means for outputting the obtained shape, mode setting means for setting any one of a first measurement mode for a convex shape and a second measurement mode for a concave shape, and condition setting means for setting at least one of a measurement condition and an output condition based on a mode setting result, the conditions being different between the first and second measurement modes.
EP02027562A 2001-12-07 2002-12-09 Shape measurement apparatus Expired - Fee Related EP1317899B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001373744A JP3703429B2 (en) 2001-12-07 2001-12-07 Corneal shape measuring device
JP2001373744 2001-12-07

Publications (3)

Publication Number Publication Date
EP1317899A2 EP1317899A2 (en) 2003-06-11
EP1317899A3 true EP1317899A3 (en) 2003-07-09
EP1317899B1 EP1317899B1 (en) 2006-12-06

Family

ID=19182409

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02027562A Expired - Fee Related EP1317899B1 (en) 2001-12-07 2002-12-09 Shape measurement apparatus

Country Status (4)

Country Link
US (1) US6755528B2 (en)
EP (1) EP1317899B1 (en)
JP (1) JP3703429B2 (en)
DE (1) DE60216557T2 (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2005880B1 (en) 2006-03-31 2017-03-22 Nidek Co., Ltd. Ophthalmologic instrument
CA2687100C (en) 2007-05-11 2016-04-12 Charles E. Campbell Combined wavefront and topography systems and methods
US7988290B2 (en) * 2007-06-27 2011-08-02 AMO Wavefront Sciences LLC. Systems and methods for measuring the shape and location of an object
US7976163B2 (en) 2007-06-27 2011-07-12 Amo Wavefront Sciences Llc System and method for measuring corneal topography
US7988293B2 (en) * 2008-11-14 2011-08-02 AMO Wavefront Sciences LLC. Method of qualifying light spots for optical measurements and measurement instrument employing method of qualifying light spots
JP5654225B2 (en) * 2009-09-30 2015-01-14 株式会社ニデック Corneal shape measuring device
JP5484139B2 (en) * 2010-03-15 2014-05-07 株式会社ニデック Ophthalmic equipment
JP6007466B2 (en) * 2010-12-27 2016-10-12 株式会社ニデック Corneal shape measuring device
WO2012130818A1 (en) * 2011-03-25 2012-10-04 National Digital Research Centre Apparatus for modelling ocular structures
US8622546B2 (en) 2011-06-08 2014-01-07 Amo Wavefront Sciences, Llc Method of locating valid light spots for optical measurement and optical measurement instrument employing method of locating valid light spots
US8562135B2 (en) 2011-08-31 2013-10-22 Nidek Co., Ltd. Ophthalmic apparatus
JP2013135837A (en) 2011-11-30 2013-07-11 Nidek Co Ltd Ophthalmic apparatus and ophthalmic program
DE102012019474A1 (en) * 2012-09-28 2014-04-03 Carl Zeiss Meditec Ag Device for the reliable determination of biometric measurements of the entire eye
CN103292738B (en) * 2013-06-26 2015-12-09 中国科学院光电技术研究所 A kind of absolute detection method for surface shape error of spherical surface
CN104976964B (en) * 2015-06-09 2017-07-14 中国科学院长春光学精密机械与物理研究所 The absolute detection method of spherical mirror and plane mirror surface-shaped error
JP2017087509A (en) * 2015-11-06 2017-05-25 東芝テック株式会社 Portable printer and computer program

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4051483A (en) * 1976-09-03 1977-09-27 Fuji Photo Optical Co., Ltd. System for measuring and recording three dimensional configuration of object
US4420228A (en) * 1980-06-12 1983-12-13 Humphrey Instruments, Inc. Method and apparatus for analysis of corneal shape
GB2177813A (en) * 1985-07-12 1987-01-28 Clement Clarke Int Keratometer
EP0549516A2 (en) * 1991-12-20 1993-06-30 Rotlex Optics Ltd. Method and apparatus for measuring optical properties of optical devices
US5742381A (en) * 1995-11-15 1998-04-21 Nikon Corporation Apparatus for measuring refractive power and radius of curvature of a lens

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4572628A (en) 1981-05-29 1986-02-25 Nippon Kogaku K.K. Method of and apparatus for measuring radius
JPS6185920A (en) * 1984-10-03 1986-05-01 株式会社　ニデツク Apparatus for measuring cornea shape
JPS6419896A (en) 1987-07-15 1989-01-23 Toshiba Corp Feeding system for telephone set controller
JPH05146407A (en) * 1991-11-26 1993-06-15 Canon Inc Instrument for measuring radius of curvature
JP3221733B2 (en) * 1992-06-30 2001-10-22 株式会社ニデック Lens measuring device
JP3269665B2 (en) * 1992-07-31 2002-03-25 株式会社ニデック Alignment detection device and ophthalmic apparatus using the alignment detection device
US5463430A (en) 1992-07-31 1995-10-31 Nidek Co., Ltd. Examination apparatus for examining an object having a spheroidal reflective surface
JPH06154166A (en) * 1992-11-27 1994-06-03 Topcon Corp Contact lens discriminating device
JP3445634B2 (en) 1993-03-31 2003-09-08 株式会社ニデック Ophthalmic equipment
US5907388A (en) 1996-10-03 1999-05-25 Nidek Co., Ltd. Ophthalmic measurement apparatus having plural pairs of photoreceiving elements
JP3560746B2 (en) * 1996-10-03 2004-09-02 株式会社ニデック Eye refractive power measuring device
US6222621B1 (en) * 1998-10-12 2001-04-24 Hoyo Corporation Spectacle lens evaluation method and evaluation device
JP2003093345A (en) * 2001-09-27 2003-04-02 Canon Inc Ophthalmologic system
JP2003106935A (en) * 2001-09-28 2003-04-09 Tomey Corporation Measurement of contact lens shape

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4051483A (en) * 1976-09-03 1977-09-27 Fuji Photo Optical Co., Ltd. System for measuring and recording three dimensional configuration of object
US4420228A (en) * 1980-06-12 1983-12-13 Humphrey Instruments, Inc. Method and apparatus for analysis of corneal shape
GB2177813A (en) * 1985-07-12 1987-01-28 Clement Clarke Int Keratometer
EP0549516A2 (en) * 1991-12-20 1993-06-30 Rotlex Optics Ltd. Method and apparatus for measuring optical properties of optical devices
US5742381A (en) * 1995-11-15 1998-04-21 Nikon Corporation Apparatus for measuring refractive power and radius of curvature of a lens

Also Published As

Publication number Publication date
JP2003169778A (en) 2003-06-17
DE60216557D1 (en) 2007-01-18
US20030107708A1 (en) 2003-06-12
DE60216557T2 (en) 2007-09-27
US6755528B2 (en) 2004-06-29
JP3703429B2 (en) 2005-10-05
EP1317899B1 (en) 2006-12-06
EP1317899A2 (en) 2003-06-11

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